/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Operations/GeodesicPath.h
requested segment if it is part of the path, otherwise return invalid segment (with EID = InvalidID)
[FDirectedSegment](API\Plugins\DynamicMesh\Operations\FEdgePath\FDirectedSegment) GetSegment ( int32 SID ) const